/Engine/Source/Runtime/Engine/Classes/Animation/MirrorDataTable.h
Converts the mirror data table Name -> MirrorName map into an index map for the given ReferenceSkeleton
void FillMirrorBoneIndexes ( const [USkeleton](API\Runtime\Engine\Animation\USkeleton) * Skeleton, TCustomBoneIndexArray< [FSkeletonPoseBoneIndex](API\Runtime\AnimationCore\FSkeletonPoseBoneIndex), [FSkeletonPoseBoneIndex](API\Runtime\AnimationCore\FSkeletonPoseBoneIndex) > & OutMirrorBoneIndexes ) const